Better to get a silicon brush thing DS can chew on [[http://www.amazon.co.uk/Brush-Baby-112-Chewable-Toothbrush-Blue/dp/B003469LAM/ref=sr_1_1?ie=UTF8&qid=1309899676&sr=8-1 Option a]] One that goes over my finger like a thimble [[http://www.amazon.co.uk/BABY-TOOTHBRUSH-Silicone-Finger-Brush/dp/B00361J9UW/ref=sr_1_2?ie=UTF8&qid=1309899811&sr=8-2 Option B]] Or a regular baby toothbrush like a smaller adults one? Help!